Back to the basis of the layout... The ABJR was formed from two separate companies, the Glencloy Light Railway Company, and the Ardaig Bay Railway Company. The GLR ran from Invercloy to Ramasaig, with a small branch to Dunbracken, while the ABR ran from Port na Cailliche to Ardaig where it connected with the Highland Railway. The ABR claimed the majority of the title of the new Joint Companie's monicker due to their higher level of fiscal solvency than the GLR. The locals often commented that if the two hadn't merged then they thought the GLR would have closed long before it did.
Both lines were separated by a small range of mountains in the centre of the headland which they both ran along either side of.
At some point in their history the two companies decided to merge and constructed a line through the glen of the mountain range to connect to each other. At one end of these glens sat Port na Cailliche, so this is actually a junction station, but the line up the glen joins some distance out of the station (so this may feature on a future extension).
Due to the two initial lines running along the coast they were blessed with fairly easy gradients, and therefore could afford the use of smaller sized locomotives, however with the construction of the line linking the two along the glens so more potent motive power was required. This was provided in the form of large tank engines and a small group of tender locos, and even a garratt for heavy mineral trains.
This operation effectively created two eras for these lines, one of independence, and one of operation as the joint line. During the time of the jont company stock still mainly operated over the lines it was originally used on, but occassionally it would be required to venture further afield on the rest of the system. The larger stock bought by the joint company could be operated over the whole system, though it seldom saw use on the Dunbracken branch due to the size of the terminus at Dunbracken.
Of course this is all fiction, but it gives reason for the ficticious town of Port na Cailliche to have a station like the one i'm proposing to build for this layout. I find knowing the sort of line you are portraying helps to decide things like the stock, how well maintained it should be (also dependent on the era you've modelled), how to operate it and many other things. I've found it quite enjoyable coming up with this little history for the line and will expand on it bit by bit, if you're interested in writing a history for your line then Ted Polet wrote an interesting article on doing so which appears in the Modeller Book of Narrow Gauge, and is well worth a read.
Port na Cailliche was chosen as the site for the larger layout as i thought it would be an ideal place to indulge my love of scenery, sited on the coast with a glen approaching the sea, rocky outcrops, a town and plenty of water. Plus being at one end of the joint line it would have seen all sorts of the stock operating so would allow me to build up a varied collection of locos and rolling stock.